PhotoelectricsensorKeyword:photoelectriceffectphotoelectricelementphotoelectricsensorclassificationsensorapplicationcharacteristics.Abstract:intherapiddevelopmentofscienceandtechnologyinthemodernsociety,mankindhasintotherapidlychanginginformationera,peopleindailylife,theproductionprocess,relymainlyonthedetectionofinformationtechnologybyacquiring,screeningandtransmission,toachievethebrakecontrol,automaticadjustment,atpresentourcountryhasputdetectiontechniqueslistedinoneoftheprioritytothedevelopmentofscienceandtechnology.Becauseofmicroelectronicstechnology,photoelectricsemiconductortechnology,opticalfibertechnologyandgratingtechnicaldevelopmentmakestheapplicationofthephotoelectricsensorisgrowing.Thesensorhassimplestructure,non-contact,highreliability,highprecision,measurableparametersandquickresponseandmoresimplestructure,formetc,andflexibleinautomaticdetectiontechnology,ithasbeenwidelyappliedinphotoelectriceffectasthetheoreticalbasis,thedevicebyphotoelectricmaterialcomposition.Text:First,theoreticalfoundation-photoelectriceffectPhotoelectriceffectgenerallyhavethephotoelectriceffect,opticaleffect,lightbornvoltseffect.Thelightshinesinphotoelectricmaterial,accordingtotheelectronicabsorptionmaterialsurfaceenergy,ifabsorbedenergylargeenoughelectronicelectronicwillovercomeboundfrommaterialsurfaceandentertheoutsidespace,whichchangesphotoelectronmaterials,thiskindofphenomenonbecometheconductivityofthephotoelectriceffectAccordingtoEinstein'sphotoelectroneffect,photonismovingparticles,eachphotonenergyforhv(vforlightfrequency,hforPlanck'sconstant,h=6.63*10-34J/HZ),thusdifferentfrequencyofphotonshavedifferentenergy,light,thehigherthefrequency,thephotonenergyisbigger.Assumingalltheenergyphotonstophotons,electronicenergywillincrease,increasedenergypartofthefetter,positiveionsusedtoovercomeanotherpartofconvertedintoelectronicenergy.Accordingtothelawofconservationofenergy:Type,mforelectronicquality,vforelectronicescapingthevelocity,Amicroelectronicstheworkdone.Fromthetypethatwillmaketheoptoelectroniccathodesurfaceescapethenecessaryconditionsareh>A.Duetothedifferentmaterialshavedifferentescaping,soreactivetoeachkindofcathodematerials,incidentlighthasacertainfrequencyisrestricted,whenthefrequencyofincidentlightunderthisfrequencylimit,nomatterhowthelightintensity,won'tproducephotoelectronlaunch,thisfrequencylimitcalled"redlimit".Thecorrespondingwavelengthfortype,cforthespeedoflight,Areactiveforescaping.Whenisthesun,itselectronicenergy,absorbtheresistivityreduceconductivephenomenoncalledopticaleffects.Itbelongstothephotoelectriceffectwithin.Whenlightis,ifinsemiconductorelectronicenergybigwithsemiconductorofforbiddenbandwidth,theelectronicenergyfromthevalencebandjumpintotheconductionband,form,andatthesametime,thevalencebandelectronicleftthecorrespondingcavities.Electronics,cavitationremainedinsemiconductor,andparticipateinelectricconductiveoutsideformedunderthecurrentrole.Inadditiontometalouter,mostinsulatorsandsemiconductorhavephotoelectriceffect,particularlyremarkable,semiconductoropticaleffectaccordingtotheoptoelectronicsmanufacturingincidentlightinherentfrequency,whenlightresistanceinlight,itsconductivityincreases,resistancedrops.Thelightintensityisstrong,itsvalue,ifthesmaller,itsresistancetostoplightbacktotheoriginalvalue.Semiconductorproducedbylightilluminatethephenomenoniscalledlighte...
